Volume 115, Issue 5
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Features
Efficiency of Farm Tractors
A Standard System of Testing Needed
The Dean of Bacteriologists
A Brief Survey of the Contributions of Elie Metchnikoff to Human Welfare
Strategic Moves of the War, July 20th, 1916
By Our Military Expert
Modern Agricultural Tractor Designs
Sharks, Man-Eating and Otherwise
The Present Status of a Very Old Subject of Controversy